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EP0631450A1 - Sous-système de communication entre des stations de base et système de commande de station de base dans des systèmes de communication à burst - Google Patents

Sous-système de communication entre des stations de base et système de commande de station de base dans des systèmes de communication à burst Download PDF

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Publication number
EP0631450A1
EP0631450A1 EP94109628A EP94109628A EP0631450A1 EP 0631450 A1 EP0631450 A1 EP 0631450A1 EP 94109628 A EP94109628 A EP 94109628A EP 94109628 A EP94109628 A EP 94109628A EP 0631450 A1 EP0631450 A1 EP 0631450A1
Authority
EP
European Patent Office
Prior art keywords
base station
field
control
station controller
base stations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94109628A
Other languages
German (de)
English (en)
Other versions
EP0631450B1 (fr
Inventor
Carlos Hita De La Torre
Francisco José Escrihuela Langa
Francisco Jávier Martinez Garcia
Carlos Hernandez Blanco
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent SAS
Original Assignee
Alcatel Standard Electrics SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcatel Standard Electrics SA filed Critical Alcatel Standard Electrics SA
Publication of EP0631450A1 publication Critical patent/EP0631450A1/fr
Application granted granted Critical
Publication of EP0631450B1 publication Critical patent/EP0631450B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
    • H04B7/2656—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/12—Access point controller devices

Definitions

  • the invention concerns a communications subsystem between base stations, that form radio links with mobile terminals using TDMA procedures, and base station controllers; this communications subsystem being implemented by means of unidirectional transmission lines.
  • any communications structure for cellular telephony it is well known how a set of base stations ace used to communicate by radio with the mobile terminals that form part of the system, these stations being connected to a base station controller which manages their operation.
  • cordless subscriber loops consisting of mobile terminals, base stations and various types of switches that perform the function of base station controller, for example the cordless private branch exchange of figure 6, page 37, which, in addition to being connected to base stations, also permits connection with standard and extended service telephone sets.
  • the connections between the private branch exchange and the base stations are made, as indicated on page 39 of the article mentioned, by means of twisted wire pairs over which data are transmitted at 2048 kb/s (CCITT Recommendation G-702).
  • the technical problem to be overcome consequently, consists in establishing communications between base stations and base station controllers without performing interface conversions.
  • the subsystem according to the invention is applicable at the communications interface between base stations and base station controllers in digital cordless communications systems that make use of time division multiple access techniques for access by the base stations to mobile terminals where the air interface is formed with a frame structure that includes a series of bursts which, in turn, comprise a guard field, a synchronisation field and an information field.
  • These communications between the base stations and the base station controllers are constituted physically by means of unidirectional transmission lines.
  • This subsystem is characterised in that communications over these transmission lines make use of an interface with a frame that has the same bit rate as that of the frame of the air interface of the cordless communications system and its structure is also the same, however in this case the guard field and the synchronisation field are replaced by a reduced synchronisation field to perform the burst synchronisation in this line transmission and by a control field to perform the interchange of control information and/or signalling between the base station controller and the base stations.
  • the clock frequency corresponding to the bit rate used in communications between the base station controller and the actual base stations is generated in a single master clock incorporated in the base station controller.
  • control field has a protection mechanism against line errors.
  • the control field includes, at least, two equal subfields, termed control subfields, in which the same control information is sent in duplicate, in a command area, plus one parity control bit for the detection of errors through parity checks, such that if both parity bits, each corresponding to a control subfield, are equal and, in addition, so too are the command areas, then it is considered that there have been no transmission errors. If only one of the parity bits is erroneous, then it is considered that the control subfield with the correct parity bit, is error-free. Finally if both parity bits are erroneous or if both are correct bit the command areas are not equal, then an error message is generated to show that the information sent in the control field could not be recovered.
  • the mobile communications system is formed from a set of base stations 2, each one with a determined radio coverage to establish cordless communication with at least one mobile terminal 3 by means of the time division multiple access (TDMA) technique and using for this at least one radiofrequency channel, as is the case of the DECT system.
  • TDMA time division multiple access
  • the base stations 2 are connected to a base station controller 1 by means of unidirectional transmission lines 10 over which the base stations 2 and their base station controller 1 interchange the necessary control information to set up a communications channel to put a base station 2 into contact with a mobile terminal 3 as well as the actual information transmitted over that channel.
  • an air interface is defined that is precisely known from the DECT system specifications, in which each frame with a duration of 10 ms, consists of 24 normal bursts (of 480 bits), there normally being 12 of these for each direction of transmission.
  • Each of the normal bursts mentioned contains, as stated, 480 bits of which at least 56 (60 when the 4-bit Z field is not used) belong to a guard field G during which no signal is transmitted to prevent overlapping between consecutive bursts coming from distinct sources and which may also be at different distances, as well as to permit transmitter on and off times, frequency changes, etc. It also has a synchronisation field S1 of 32 bits which comprises clock synchronising bits and burst synchronising bits, and a data field D of 388 bits that contains the information being interchanged between the base station 2 and the mobile terminal 3.
  • half-length bursts of 240 bits and double-length bursts of 960 bits are defined, so that a normal burst can be replaced by two half-length bursts and two normal bursts can be grouped into one double-length burst.
  • these types of burst also have a guard field G and a synchronisation field S1, as well as the data field, which in these cases are of 148 and 868 bits respectively for the half-length and double-length bursts.
  • the links between the base stations 2 and their base station controller 1, formed by means of unidirectional transmission lines 10, are formed through a continuous interface according to the invention, the bit rate of which is the same as that of the air interface and that has a frame structure similar to the latter, employing for this two unidirectional transmission lines 10, one For each transmission direction (base stations to base station controller and base station controller to base stations).
  • the frame structure for these interfaces is similar to that of the air interface but with suppression of the guard field G in each burst, because it is no longer necessary for this type of fixed link, and reducing the synchronisation field S1 of the air interface through the suppression of the bit synchronising part which is not required for continuous transmission, and reducing equally the number of bits in the burst synchronising part.
  • the frames For each of the transmission directions in the unidirectional transmission lines 10, the frames have the same structure.
  • This frame structure holds the same number of bursts, each constituted by a reduced synchronisation field S2 of 8 bits, that contains one fixed word and that serves to determine the beginning of each burst; a control field C of 64 bits per burst that is used to transmit the control and/or signalling information both in the direction of base station controller 1 to base stations 2 and in the direction of base stations 2 to base station controller 1; and the data field F that includes the same information as field D and Field Z of a DECT burst.
  • control field C Since the information contained in the control field C is of essential importance for system operation, this field is further protected by means of a protection mechanism against errors based on duplicating information and parity bits.
  • the control field C comprises two control subfields, each of 28 bits and identical to each other, containing respectively a command area CA and CB and a parity control bit PA and PB.
  • the following process takes place: first the parity of each control subfield is obtained and a check is made for coincidence of the respective parity bits PA and PB. If this coincidence is present and also both the command areas CA and CB are equal, then both command areas CA and CB are considered error-free. In the event that only one of the parity bits PA or PB is correct, then that command area CA or CB whose parity bit is correct is considered to be error-free and, finally, if neither of the parity bits PA or PB is correct, or if both are correct but the command areas CA and CB are not equal, then an error message is produced in order to indicate this situation.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)
EP94109628A 1993-06-25 1994-06-22 Sous-système de communication entre des stations de base et système de commande de station de base dans des systèmes de communication à burst Expired - Lifetime EP0631450B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES09301440A ES2078150B1 (es) 1993-06-25 1993-06-25 Subsistema de comunicaciones entre estaciones base y controladores de estaciones base en sistemas de comunicaciones a rafagas.
ES9301440 1993-06-25

Publications (2)

Publication Number Publication Date
EP0631450A1 true EP0631450A1 (fr) 1994-12-28
EP0631450B1 EP0631450B1 (fr) 2002-05-15

Family

ID=8282354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94109628A Expired - Lifetime EP0631450B1 (fr) 1993-06-25 1994-06-22 Sous-système de communication entre des stations de base et système de commande de station de base dans des systèmes de communication à burst

Country Status (8)

Country Link
US (1) US5533028A (fr)
EP (1) EP0631450B1 (fr)
JP (1) JPH07143543A (fr)
AT (1) ATE217747T1 (fr)
CA (1) CA2126654A1 (fr)
DE (1) DE69430606T2 (fr)
ES (1) ES2078150B1 (fr)
FI (1) FI943047A7 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0722229A1 (fr) * 1995-01-16 1996-07-17 Telia Ab Equipement pour système de télécommunication
GB2305081A (en) * 1995-09-01 1997-03-26 Motorola Inc Reducing messaging in a TDMA communications system
WO1997015994A1 (fr) * 1995-10-23 1997-05-01 Nokia Mobile Phones Limited Procede, dispositif et reseau de communication anticollision pour communication radio
WO1998010606A1 (fr) * 1996-09-06 1998-03-12 Northern Telecom Limited Architecture sans fil a fonctions d'acces redistribuees
CN1085022C (zh) * 1996-08-24 2002-05-15 三星电子株式会社 数字移动通信系统中检测频率校正脉冲串的电路和方法
GB2375692A (en) * 2001-05-18 2002-11-20 Roke Manor Research Synchronising base stations in an UMTS terrestrial radio access telecommunications system

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DE4496920T1 (de) * 1993-09-17 1997-07-31 Motorola Inc Verfahren und Vorrichtung zur Übergabe von Netzwerkbauteilsfunktionen zwischen Netzwerkbauteilen
TW293220B (fr) * 1994-03-23 1996-12-11 Tecnomen Oy
JP2605673B2 (ja) * 1994-06-06 1997-04-30 日本電気株式会社 Ｔｄｍａ無線通信システム
SE9404121L (sv) * 1994-11-29 1995-12-04 Telia Ab Metod för synkronisering av sändare och mottagare vid mobilt radiosystem
EP0758822B1 (fr) * 1995-08-11 2006-03-01 Alcatel Méthode et circuit pour l'allocation dynamique de bande passante dans un système de communication TDM-AMRT
US5978369A (en) * 1995-09-08 1999-11-02 Vlsi Technology, Inc. Efficient generation within a remote base station of a synchronization signal for a cordless communication system
US5805576A (en) * 1995-10-18 1998-09-08 Cellular Telecom, Ltd. Method and apparatus for TDMA wireless communication employing collector arrays for range extension
US6031846A (en) * 1996-12-06 2000-02-29 Philips Electronics North America Corp. Method and apparatus for improved time division multiple access (TDMA) communication
FI980704L (fi) * 1998-03-27 1999-09-28 Nokia Networks Oy Menetelmä lähettää synkronoitu kanava radiolähettimessä
KR100489571B1 (ko) * 1998-05-29 2005-08-01 유티스타콤코리아 유한회사 이동통신 시스템의 기지국 링크 운영방법
US6965608B1 (en) * 1998-06-30 2005-11-15 Cisco Technology, Inc. Method and apparatus for transmitting data in a public network
AU2756201A (en) 2000-01-07 2001-07-16 Mdiversity, Inc. Dynamic channel allocation in multiple-access communication systems
US7710940B2 (en) * 2001-10-16 2010-05-04 Telefonaktiebolaget L M Ericsson (Publ) Synchronisation of mobile equipment in time division duplex CDMA system
US8139655B2 (en) * 2008-06-09 2012-03-20 Sony Corporation System and method for effectively transferring electronic information
WO2017195081A1 (fr) 2016-05-10 2017-11-16 Netsia, Inc. Système et procédé de communication entre des stations de base programmables et des contrôleurs de réseau d'accès radio défini par logiciel

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EP0189822A2 (fr) * 1985-01-30 1986-08-06 ANT Nachrichtentechnik GmbH Système radio mobile numérique

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US5293380A (en) * 1989-12-27 1994-03-08 Nec Corporation Frame synchronization system among multiple radio base stations for TDMA digital mobile communications system
JP3093243B2 (ja) * 1990-07-12 2000-10-03 株式会社東芝 移動無線通信システム
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EP0168647A2 (fr) * 1984-07-19 1986-01-22 ANT Nachrichtentechnik GmbH Système radio-mobile pour la transmission de signaux digitaux
EP0189822A2 (fr) * 1985-01-30 1986-08-06 ANT Nachrichtentechnik GmbH Système radio mobile numérique

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0722229A1 (fr) * 1995-01-16 1996-07-17 Telia Ab Equipement pour système de télécommunication
GB2305081A (en) * 1995-09-01 1997-03-26 Motorola Inc Reducing messaging in a TDMA communications system
GB2305081B (en) * 1995-09-01 2000-02-09 Motorola Inc Method for communicating data in a wireless communication system
WO1997015994A1 (fr) * 1995-10-23 1997-05-01 Nokia Mobile Phones Limited Procede, dispositif et reseau de communication anticollision pour communication radio
DE19641084B4 (de) * 1995-10-23 2012-07-19 Nokia Mobile Phones Ltd. Verfahren, Vorrichtung und Kommunikationsnetzwerk zum Vermeiden von Kollisionen bei Funkkommunikation
RU2201035C2 (ru) * 1995-10-23 2003-03-20 Нокиа Мобайл Фоунс Лтд. Способ, устройство и сеть связи для устранения наложения сигналов при проведении радиосвязи
US5966378A (en) * 1995-10-23 1999-10-12 Nokia Mobile Phones Ltd. Method, device and communication network for avoiding collisions in radio communication
GB2306858B (en) * 1995-10-23 1999-11-24 Nokia Mobile Phones Ltd Method, device and communication network for avoiding collisions in radio communication
AT408047B (de) * 1995-10-23 2001-08-27 Nokia Mobile Phones Ltd Verfahren, mobilstation, vorrichtung und kommunikationsnetzwerk zum vermeiden von kollisionen bei funkkommunikation
CN1085022C (zh) * 1996-08-24 2002-05-15 三星电子株式会社 数字移动通信系统中检测频率校正脉冲串的电路和方法
US5896568A (en) * 1996-09-06 1999-04-20 Northern Telecom Limited Wireless architecture having redistributed access functions
WO1998010606A1 (fr) * 1996-09-06 1998-03-12 Northern Telecom Limited Architecture sans fil a fonctions d'acces redistribuees
GB2375692A (en) * 2001-05-18 2002-11-20 Roke Manor Research Synchronising base stations in an UMTS terrestrial radio access telecommunications system

Also Published As

Publication number Publication date
DE69430606D1 (de) 2002-06-20
FI943047A0 (fi) 1994-06-23
ES2078150B1 (es) 1998-01-01
US5533028A (en) 1996-07-02
FI943047A7 (fi) 1994-12-26
EP0631450B1 (fr) 2002-05-15
JPH07143543A (ja) 1995-06-02
ES2078150A2 (es) 1995-12-01
DE69430606T2 (de) 2002-12-05
ES2078150R (fr) 1997-05-01
ATE217747T1 (de) 2002-06-15
CA2126654A1 (fr) 1994-12-26

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